<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div class="my-3">
        <div class="form-check">
          <input id="credit" name="firstMethod" type="radio" class="form-check-input" checked="" required="">
          <label class="form-check-label" for="credit">黑</label>
        </div>
        <div class="form-check">
          <input id="debit" name="firstMethod" type="radio" class="form-check-input" required="">
          <label class="form-check-label" for="debit">棕</label>
        </div>
        <div class="form-check">
          <input id="paypal" name="firstMethod" type="radio" class="form-check-input" required="">
          <label class="form-check-label" for="paypal">红</label>
        </div>
        <div class="form-check">
        <input id="credit" name="firstMethod" type="radio" class="form-check-input" checked="" required="">
        <label class="form-check-label" for="credit">橙</label>
      </div>
      <div class="form-check">
        <input id="debit" name="firstMethod" type="radio" class="form-check-input" required="">
        <label class="form-check-label" for="debit">黄</label>
      </div>
      <div class="form-check">
        <input id="paypal" name="firstMethod" type="radio" class="form-check-input" required="">
        <label class="form-check-label" for="paypal">绿</label>
      </div>
      <div class="form-check">
      <input id="credit" name="firstMethod" type="radio" class="form-check-input" checked="" required="">
      <label class="form-check-label" for="credit">蓝</label>
    </div>
    <div class="form-check">
      <input id="debit" name="firstMethod" type="radio" class="form-check-input" required="">
      <label class="form-check-label" for="debit">紫</label>
    </div>
    <div class="form-check">
      <input id="paypal" name="firstMethod" type="radio" class="form-check-input" required="">
      <label class="form-check-label" for="paypal">灰</label>
    </div>
    <div class="form-check">
    <input id="credit" name="firstMethod" type="radio" class="form-check-input" checked="" required="">
    <label class="form-check-label" for="credit">白</label>
  </div>

      </div>
</body>
</html>